相关实验视频
Updated: Jan 12, 2026

05:55
Rapid Isolation of Wild Nematodes by Baermann Funnel
Published on: January 31, 2022
10.5K
同位素证据表明,在哥伦比亚前的巴拿马,社会多样化增加了
Ashley E Sharpe1, Nicole E Smith-Guzmán1,2,3, Claudia Patricia Díaz Pérez4
1Center for Tropical Paleoecology and Archaeology, Smithsonian Tropical Research Institute, Balboa-Ancón, Panama.
PloS one
|November 6, 2025
概括
古代巴拿马的首领从公元700年开始表现出不断发展的饮食和流动性. 同位素分析揭示了社区生活的转变,截然不同的社会角色和葬礼实践在公元1150年出现.
科学领域:
- 考古学的考古学
- 古生态学 古生态学
- 同位素分析的分析.
背景情况:
- 哥伦布前的巴拿马拥有复杂的族长,与中美洲和安第斯社会不同.
- 公元前7000年的园艺和公元前2500年的陶表明,在海峡地区早期采用了技术.
- 巴拿马首领 (200 BCE - 1500 CE) 的社会文化发展仍然不完全理解.
研究的目的:
- 用同位素分析研究古代巴拿马的饮食和运动模式.
- 重建 Cerro Juan Díaz 遗址和周边地区的首领社会文化演变.
- 在西班牙人接触之前的1500年里,了解巴拿马的社会趋势.
主要方法:
- 49个个体的骨和牙面膜的同位素分析 (碳,,氧,).
- 整合新的同位素数据与附近考古遗址的现有数据.
- 与考古学和民族历史记录一起解释同位素发现.
主要成果:
- 早期居民 (公元前700年) 一致消费玉米和海洋资源.
- 到公元700年,个人之间出现了饮食和地理流动性的显著变化.
- 到公元1150年,性别和年龄段之间出现了不同的同位素签名,表明了不同的社会角色和葬礼实践.
结论:
- 同位素数据揭示了古代巴拿马人口的饮食和移动性随着时间的推移而发生的重大变化.
- 新兴的同位素差异突出显示了日益增长的社会复杂性,多样化的角色和各种各样的葬礼习俗.
- 这项研究增强了对欧洲人抵达前巴拿马长发展的理解.
相关概念视频
The Evidence for Evolution
47.5K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
47.5K
Speciation Rates
22.6K
Overview
22.6K
Gene Flow
37.3K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
37.3K
Diversity of Protists II
757
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
757
Diversity of Protists III
716
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
716
Diversity of Protists IV
729
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
729

